Coefficient of Conservatism:
Coefficient of Wetness:
R. W. Smith
Deciduous forests, swamps, and river-bank thickets. Southern Michigan is at the northern edge of the range of this species. The Upper Peninsula record is from seedlings spreading from planted trees originating from Illinois.
A very few specimens from Berrien, Oakland, and Washtenaw Cos. have sparse stipitate glands on the pedicels, interpreted as being suggestiive of introgression with Aesculus flava (and some specimens thus determined as A. flava × A. glabra). But any influence of A. flava is presumably negligible; such specimens otherwise seeming like typcal A. glabra in morphology and ecology. They are mapped as A. glabra.
Aesculus glabra is the earliest native tree to leaf out, and may bloom as early as April.